RT Book, Section A1 Ellison, E. Christopher A1 Zollinger, Robert M. SR Print(0) ID 1127273171 T1 Excision of Pilonidal Sinus T2 Zollinger's Atlas of Surgical Operations, 10e YR 2016 FD 2016 PB McGraw-Hill Education PP New York, NY SN 978-0-07-179755-9 LK accesssurgery.mhmedical.com/content.aspx?aid=1127273171 RD 2024/10/04 AB Pilonidal cysts and sinuses should be completely excised or exteriorized (figure 1a and b) . Acutely infected sinuses should be incised and drained, followed later by complete excision after the acute infection subsides. The more limited procedure of exteriorization (marsupialization) is effective when the sinus tract is well defined (figure 1b). Regardless of the various surgical approaches, such lesions may recur.